Book excerpt: It may sound crazy, but Elvis Presley - that god-fearing, gospel-singing American pop icon - was a Jew; these maverick journalists and filmmakers have proven it. A behind-the-scenes account of their irreverent and witty film documentary, in which Wallace and Goldstein took a Hasidic Jewish Elvis impersonator and an Orthodox Rabbi on a trek to trace Elvis's roots all the way to Israel and then bring the good news home to Graceland, this book compiles production logs, selections from the script, trivia and the investigator's official report on Elvis's roots.